题目内容
计算:
(1)-(+5)-
+(-2)-2-(
-2)0
(2)
÷
-
.
(1)-(+5)-
|
| 3 |
(2)
| 3x+6 |
| x2+4x+4 |
| x-2 |
| x+2 |
| 1 |
| x-2 |
(1)-(+5)-
+(-2)-2-(
-2)0
=-5-
+
-1
=-6
(2)
÷
-
=
×
-
=
|
| 3 |
=-5-
| 1 |
| 4 |
| 1 |
| 4 |
=-6
(2)
| 3x+6 |
| x2+4x+4 |
| x-2 |
| x+2 |
| 1 |
| x-2 |
=
| 3(x+2) |
| (x+2)2 |
| x+2 |
| x-2 |
| 1 |
| x-2 |
=
| 2 |
| x-2 |
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